rhel8.4.z ppc64le crashes with a message "kernel BUG at arch/powerpc/lib/locks.c:34!"

Issue

• rhel8.4.z ppc64le crashes with a message "kernel BUG at arch/powerpc/lib/locks.c:34!"

[2290463.091198] ------------[ cut here ]------------
[2290463.091201] kernel BUG at arch/powerpc/lib/locks.c:34!
[2290463.091205] Oops: Exception in kernel mode, sig: 5 [#1]
[2290463.091208] LE SMP NR_CPUS=2048 NUMA pSeries
[2290463.091212] Modules linked in: nfsv3 nfs_acl nfs lockd grace fscache rpadlpar_io rpaphp mptcp_diag xsk_diag tcp_diag udp_diag raw_diag inet_diag unix_diag af_packet_diag netlink_diag bonding nft_fib_inet nft_fib_ipv4 nft_fib_ipv6 nft_fib nft_reject_inet nf_reject_ipv4 nf_reject_ipv6 nft_reject nft_ct nf_tables_set nft_chain_nat nf_nat nf_conntrack nf_defrag_ipv6 nf_defrag_ipv4 ip_set nf_tables nfnetlink sunrpc loop pseries_rng xts vmx_crypto uio_pdrv_genirq uio binfmt_misc ip_tables xfs libcrc32c raid1 dm_service_time sd_mod t10_pi sg ibmvfc ibmveth scsi_transport_fc dm_multipath dm_mirror dm_region_hash dm_log dm_mod
[2290463.091266] CPU: 0 PID: 0 Comm: swapper/0 Kdump: loaded Not tainted 4.18.0-305.12.1.el8_4.ppc64le #1
[2290463.091271] NIP:  c0000000000b529c LR: c000000000ee1c88 CTR: c0000000001ec9a0
[2290463.091274] REGS: c000001fffffb9b0 TRAP: 0700   Not tainted  (4.18.0-305.12.1.el8_4.ppc64le)
[2290463.091278] MSR:  8000000000029033 <SF,EE,ME,IR,DR,RI,LE>  CR: 48000284  XER: 00000000
[2290463.091285] CFAR: c000000000ee1c84 IRQMASK: 1 
                 GPR00: c000000000ee1c88 c000001fffffbc40 c000000001c01400 c000001fda717b60 
                 GPR04: c000001fcdee0350 c000001fd7f76b60 0000000000000071 0000000000016270 
                 GPR08: c000001fcdee0350 0000000000000001 0000000048008422 d00000000d5c31d0 
                 GPR12: c0000000001ec9a0 c000000002860000 000000000b8e18b8 000000000b803b80 
                 GPR16: 0000000000000100 0000000000000100 0000000000000007 c000000001c22130 
                 GPR20: 0000000000000006 0000000000200002 0000000000000001 c000001fd008b610 
                 GPR24: c000001fd0080000 0000000000000000 5deadbeef0000100 0000000000000000 
                 GPR28: c000001fd7f76b60 0000000000000001 0000000000000001 c000001fda717b60 
[2290463.091318] NIP [c0000000000b529c] __spin_yield+0x2c/0xb0
[2290463.091323] LR [c000000000ee1c88] _raw_spin_lock_irqsave+0x118/0x120
[2290463.091325] Call Trace:
[2290463.091329] [c000001fffffbc40] [c000001fcdef6270] 0xc000001fcdef6270 (unreliable)
[2290463.091335] [c000001fffffbc80] [c0000000001ec9d8] complete+0x38/0x90
[2290463.091343] [c000001fffffbcc0] [d00000000d5b08a4] ibmvfc_free_event+0x11c/0x160 [ibmvfc]
[2290463.091347] [c000001fffffbd10] [d00000000d5bb24c] ibmvfc_tasklet+0x314/0x400 [ibmvfc]
[2290463.091352] [c000001fffffbda0] [c000000000171c84] tasklet_action_common.isra.3+0xc4/0x1a0
[2290463.091357] [c000001fffffbe00] [c000000000ee274c] __do_softirq+0x16c/0x400
[2290463.091361] [c000001fffffbef0] [c0000000001716e4] irq_exit+0x184/0x1c0
[2290463.091365] [c000001fffffbf20] [c000000000013678] __do_irq+0xb8/0x210
[2290463.091371] [c000001fffffbf90] [c0000000000261dc] call_do_irq+0x14/0x24
[2290463.091374] [c000000001bff9a0] [c00000000001386c] do_IRQ+0x9c/0x130
[2290463.091380] [c000000001bff9f0] [c000000000008ce0] hardware_interrupt_common+0x110/0x120
[2290463.091387] --- interrupt: 501 at plpar_hcall_norets+0x1c/0x28
                     LR = shared_cede_loop+0x128/0x190
[2290463.091394] [c000000001bffcf0] [c000000001c373bc] cpu_idle_force_poll+0x0/0x4 (unreliable)
[2290463.091399] [c000000001bffd70] [c000000000b59470] cpuidle_enter_state+0x330/0x7c0
[2290463.091403] [c000000001bffde0] [c000000000b599a0] cpuidle_enter+0x50/0x70
[2290463.091408] [c000000001bffe20] [c0000000001c43f8] do_idle+0x3d8/0x470
[2290463.091412] [c000000001bffea0] [c0000000001c46dc] cpu_startup_entry+0x3c/0x40
[2290463.091416] [c000000001bffed0] [c0000000000105b4] rest_init+0xe0/0xf8
[2290463.091422] [c000000001bfff00] [c0000000015244a0] start_kernel+0x680/0x6bc
[2290463.091426] [c000000001bfff90] [c00000000000adbc] start_here_common+0x1c/0x560
[2290463.091429] Instruction dump:
[2290463.091432] 4e800020 3c4c01b5 3842c190 7c0802a6 60000000 81430000 2faa0000 4d9e0020 
[2290463.091437] 55490428 7d290034 5529d97e 69290001 <0b090000> 3ce20003 38e75a00 79481b68 
[2290463.091445] ---[ end trace 367f290cf39a1b60 ]---